Plumber&#39;s testing-plug.



No. 705,059. Patented'luly 22, I902.

J. FLYNN.

PLUMBERS TESTING PLUG.

(Au'nlice-tion filed Oct. 1, 1901.) (No Moder.)

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2 1 zZ/(W UNITED STATES JOSEPH FLYNN, OF BOSTON, MASSACHUSETTS.

PLUMBERS TESTING PLUG.

SPECIFICATION forming part of Letters Patent No. 705,059, dated July 22,1902. Application filed October 1, 1901. Serial No. 77,203. (No model.)

To ctZZ whom, it may concern.-

Be it known that I, J osnrn FLYNN, a citi zen of Great Britain, residingat Boston, in the county of Suffolk and State of Massachusetts, haveinvented new and usefullmprovements in Plumbers Testing-Plugs, of whichthe following is a specification.

This invention relates to improvements in plumbers testing-plugs for thepurpose of testing sewer-pipes, drain-pipes, &-c., in buildings, so asto ascertain whether or not any leakage exists in the system of piping,and it is carried out as follows, reference being had to theaccompanying drawings, wherein-- Figure 1 represents a side elevation ofthe improved testing-plug, showing it in its contracted position andshowing the expansive rubber cylinder and drain or sewer pipe insection. Fig. 2 represents a cross-section on the line 2 2 shown inFig. 1. Fig. 3 represents a central longitudinal section of the device,showing the plug and its rubber cylinder expanded within the drain orsewer pipe during the testing operation. Fig. 4 represents a detailperspective view of one of the expansive duplex wedge-sections arrangedwithin the expansive rubber cylinder, and Fig. 5 represents across-section on the line 5 5 shown in Fig. 4:-

Similar letters refer to similar parts wherever they occur on thedifferent parts of the drawings.

'A represents the drain or sewer pipe desired to be tested.

The improved testing-plug consists of a tapering annular disk B, whichis secured to a preferably tubular spindle O, on which is longitudinallyadjustable a similar tapering annular disk D, provided with a sleeve d,longitudinally movable with the disk D on the said spindle O, as shown.

E E E E are a series of duplex tapering interlocking segmental platesengaging the tapering disks B D, as shown. One of such segmental platesE is provided, preferably, in one end with a projection 6, adapted tointerlock with a corresponding recess or cutawayportion e in theadjacent plate, as shown in Figs. 1 and 4:.

The expansive plates E E E E and disks B D are arranged within, ayielding rubber cylinder G, having a closed end G, which is secured tothe spindle O and disk B, preferably by means of a nut C, as shown inFigs. 1 and 3. The opposite end of the expansive rubber cylinder G isprovided with an inwardly-projecting annular flange or lip G forpreventing the adjustable disk D from being withdrawn from within theexpansive yielding cylinder G, as shown in Figs. 1 and 3.

The outer end of the spindle O is screwthreaded, as shown at O", andonto it is screwed an adjustable thumb-nut H, the inner end of whichbears against the outer end of the sleeve d, as shown.

In using the device the thumb-nut H is partiallyunscrewed from thespindle O, as shown in Fig. 1, which allows of the contraction of theelastic rubber cylinder G and consequent inward movement of theinterlocking plates E E E E when the disk D is moved outward or awayfrom the stationary disk B, which may be accomplished simply by takinghold ofthe sleeve d and pulling it outward to the position shown inFig. 1. The device is then introduced into the drain or sewer pipe A tobe tested, as represented in said Fig. .1. By tightening the nut H thedisk D is caused to be moved toward the disk B, and during suchadjustment of said disk D thesegmental tapering plates E E E E arecaused to be expanded, and thereby causing the rubber cylinder to beexpanded and forced air and water tight against the inner surface of thedrain or sewer pipe A, as shown in Fig. 3, thus effectually closing theend of said pipe A, after which the condition of the latter is to betested in the usual manner either by forcing water under pressurethrough the hollow spindle O, or, if the latter should be made solid,theliquid under pressure may be forced into the pipe system at anydesirable place thereon.

What I wish to secure by Letters Patent andclaim is-'- v Theherein-described plumbers testingplug,consisting in combination, anexpansive rubber cylinder G, having in one end a closed portion G, andan annular lip G, in its opposite end, and an expanding device arrangedwithin said rubber cylinder consisting of a tapering disk B, a spindleC, and rubber cylinder G, a longitudinally-adjustable tapering disk D, aseries of interlocking duplex tapering segmental plates E, E, E, E, andmy hand in presence of two subscribing witmeans for expanding the latterand the rubnesses. V

bercylinder so as to force the said rubber cylinder against the interiorof the pipe to be JOSEPH FLYNN' Witnesses:

5 tested, substantially as and for the purpose set forth.

In testimony whereof I have hereunto set ALBAN ANDREN, ROBERT H. O.SCHULZ.

